Automatic elevator



(No Model.)

G.- O. TEWKSBURY.

AUTOMATIC ELEVATOR.

UNITED STATES "PATENT OFFICE.

GEORGE O. TEWKSBURY, OF NEWARK, NEW JERSEY.

AUTOMATIC ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 264,793, datedSeptember 19, 1882.

Application filed July 31, 18852. (No model.)

To all whom it may concern:

Be it known that I, GEORGE (J. TEWKS- BURY, of Newark, in the county ofEssex and State of New Jersey, have invented a new and usefulImprovement in Automatic Elevators; and I do hereby. declare that thefollowing is a full, clear, and exact description of the same.

My invention relates to an improvement in automatic lifts or elevatorsof the classfor which Letters Patent were granted me on the 14th day ofMarch, 1882.

The invention consists in an improved device for operating theshipping-rod and for setting the parts in position to stop the elevatorautomatically at its proper destination.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a side elevation; Fig. 2, a plan of rack and pinion on anenlarged scale. Fig. 3 is a detail view of Fig. l, enlarged.

The general features of this device are the same as' those described inthe patent referred to.

A represents a guide-bar on one side of the elevator-well, in whichslides the lift or platform, it being understood that there are two ofsuch guide-bars placed on opposite sides of the well.

0 is the shipping-rod, which extends the entire length of the well, andis adapted to have vertical and rotary motion. It is guided ..in itsvertical movement by standards D, se-

cured to the guide-bars. It is understood that at its upper end this rodis connected with the shipping-bar by bolts in the manner described inmy patents; but it has been deemed unnecessary to show these connectionsin this application, which refers to a different portion oftheapparatus. The rod is, however, balanced by a counter-weight, 8, asshown. The starting-lever 5 is pivoted to the guide-bars A, and isconnected by toggles Y to a loose collar, I, upon the shipping-rod O.This collar is held in place between two tight collars, E E, on the saidrod, and it will be understood that the vertical movement of the rodGris given to it by a direct pressure of the hand on the lever 5.

Secured to the guide-bar A is a frame or standard, K, and on thisstandard are bearings O O, which form guides in which slides the rack P.This frame is provided with an integral curved projection or arc, N,which are is graduated by lines R, each of which represents a singlefloor of the building. ()n the frame K is a stud or standard, 4, towhich is pivoted the handle M. At apoint near the pivot this handle isenlarged, and is provided with a slot, 3, which works over a pin, 2, onthe rack. Motion of the handle M around the graduated arc will thuscause the rack to reciprocate horizontally and to give the necessaryrotation to therod 0 by means of the pinion F, which is keyed orotherwise secured thereto. Upon the rod C- are tappets H, one beingplaced at each landing, and all of such tappets being set at differentangles. On the elevator-platform B is a dog, 7, adapted to projectoutward to engage with the tappets on the rod 0.

It will be understood that the tappetson the rod 0 are arranged inproper relation to the graduated scale on the arc, so that the opera- 7mark on the scale, corresponding motion being given to the rack throughthe pinion to the rod, which is thereby turned a sufficient distance tobring the corresponding tappet in line with the dog 7 on the elevator.The rod 0 is then moved vertically through the lever 5, as described,which shifts the belts and causes it to ascend or descend, as the casemay be, until its course is arrested by the dog 7 striking the tappet onthe rod at the proper destination of the elevator.

What I claim is- 1. In an automatic elevator, the combination, with theguide bars A and the shipper-rod 0, having the pinion F and tappets H,the frame K, secured to the guide-bar, and having the rack engaging withthe said pinion, the pivoted handle M, attached to said rack, and theindicating-scale, all substantially as described.

2. The combination of the guide-bars A and 9 5 IOU 3. The frameK,seeured to the guide-bar and to this specification in the presence oftwo subhaving the standard 4, and graduated are N, scribing witnesses.in combination with the shipper-rod having I the pinion, the rack 1?,having the pin 2, and GEO. (J. TEWKSBURY. 5 the slotted handle M,pivoted to the said standard, substantially as and for the purposes setWitnesses: forth. JOHN A. OSBORN,

In testimony whereof I have signed my name J. M. BADGER.

